Scientific American Volume 02 Number 34 (May 1847) . tion of the Secretary of War to the subject,and soon after had the gratification of seeinghis views embodied in an Act which passed atthe late session of Congress. This act pro-vides for the equipment of four additional corpsof Light Artillery, making eight in all; andalso provides for the temporary detachment ofthese companies from their respective regi-ments under certain circumstances. Whensodetached they are to be organized into twoseparate battallions, each of four companies:and these may be subdivided into demi battal-lions, as the ser


Scientific American Volume 02 Number 34 (May 1847) . tion of the Secretary of War to the subject,and soon after had the gratification of seeinghis views embodied in an Act which passed atthe late session of Congress. This act pro-vides for the equipment of four additional corpsof Light Artillery, making eight in all; andalso provides for the temporary detachment ofthese companies from their respective regi-ments under certain circumstances. Whensodetached they are to be organized into twoseparate battallions, each of four companies:and these may be subdivided into demi battal-lions, as the service may require, with appro-priate field commanders, selected for their ex-perience and ability in the field. This force,in the aggregate, can present a battery consist-ing of two battallions of forty-eight pieces, towit:—thirty-two 6 pounders, and sixteen 12pounders howitzers, and be susceptible of di-vision and subdivision into batteries of twen-ty-four, twelve, and six guns respectirely 11847 SCIENTIFIC AMERICIAN, INC SCIENTIFIC AMERICAN. 269. NEW YORK, MAY 8, 1847. Ancient Astronomical Knowledge. The honor of arranging the observed factsinto something like order and, consequently,the invention of the science of astronomy, is at-tributed by different writers to various nations—namely, the Chaldeans, the Egyptians, theChinese, and the Indians. Beneath the fineclimate and in the level plains of Chaldea thespectacle of the heavens, everywhere so stri-king, must have forcibly arrested the attentionof a people just emerging from a state of bar-barism ; and the habit of observation was, per-haps, increased by the addiction of their sagesto judicial astrology, and to endeavor to dis-cover the imagined relations between the starsand human destinies. From the plains of Chal-dea this habit of observing astronomical chan-ges made its way to the valley of the Nile,andhence the Egyptians soon became well versedtherein. The Chaldean and Egyptian recordsfurnished materials from which


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